Benzoylethyl quaternary ammonium compounds as anthelmintic agents



US. Cl. 260-2934 2 Claims ABSTRACT OF THE DISCLOSURE Quaternary benzoylethyl ammonium compounds, including new compounds which have amino groups in the para-position of the phenyl ring, are useful as anthelminsic agents.

This application is a division of Ser. No. 521,831, now US. Pat. No. 3,453,313.

The present invention concerns new anthelmintically active compositions and feedstulfs which contain quaternary ammonium compounds as active substances, their use for combatting parasitic helminths and for the prevention of helminthiasis as well as other syndromes caused by the presence of hehninths, and concerns also a process for the production of the new active substances as well as that of the aforesaid compositions. Furthermore the present invention concerns new quaternary ammonium compounds' The compositions according to the invention can be either in the form of veterinary-medicinal preparations or of feed additions.

In the present description the term helminths refers to nematodes, cestodes and trematodes i.e. to worms which infest the gastrointestinal tract, the liver and other organs.

Of the endoparasites which occur in farm or domestic animals, helminths are among those which cause the great est damage to these animals. Not only do the animals attacked show retarded growth or poor increase in weight because of the insufiicient utilisation of feed given to them, but often injuries occur which can result in the death of the animals. It is, therefore, of great importance to develop veterinary agents and feed additives which are suitable for combatting helminths in all stages of their development and for preventing damages caused by them (helminthiasis). Up to the present, a number of substances have been recommended as anthelmintics, but they are not completely satisfactory, be it that they show only a very specific action on certain helminths or that their action is either weak if applied in toxicologically tolerable doses, or that undesirable side efiects appear leading to severe organic injuries if they are applied in fully effective doses/For example, allyloxy-phenyl isothiocyanate described as an anthelmintic agent is of considerable toxicity.

It has now been found that veterinary-medical agents or feed additions which contain as active ingredients ited States Patent ICC quaternary ammonium compounds of the general For- R represents an alkyl, alkenyl or alkynyl radical, each of which radicals has maximally 4 carbon atoms,

R represents an alkyl radical having from 1 to 4 carbon atoms, the benzyl or phenethyl radical or a benzyl or phenethyl radical mono. or polysubstituted by halogen atoms, by alkoxy or alkylthio groups having from 1 to 4 carbon atoms or by methyl, hydroxyl, nitro or cyano groups, or

R and R together with the nitrogen atom to which they are linked represent the pyrrolidine, piperidine, morpholine or thiamorpholine radical, or a methylated pyrrolidine, piperidine, morpholine or thiamorpholine radical,

R represents an alkyl radical having from 1 to 4 carbon atoms, and in the case that R is an alkyl radical, R may also represent the benzyl or phenethyl radical or a benzyl or phenethyl radical monoor polysubstituted moiety, an alkanoyl or alkenoylamino radical having at most 5 carbon atoms or the benzoylamino radical, or cyano groups,

R represents hydrogen, a halogen atom, the hydroxyl or nitro group, an alkyl or alkoxy radical having 1 to 12 carbon atoms, the methylthio or ethylthio radical, the amino group or a monoalkylamino or dialkylamino radical having from 1 to 4 carbon atoms in each alkyl moiety, an alkanoyl or alkenoylamino radical having at most 5 carbon atoms or the benzoylamino radical, and

X represents an anion of an inorganic or organic acid which aifords a salt of Formula I which is therapeutically-acceptable and well tolerated by the animal organism.

are very efiective against helminths and that, because of their low toxicity in warm blooded animals and good tolerance by the the organism, these substances are very well suited for combatting the said endoparasites and for controlling the disturbances and symptoms caused by them. When used as ingredients of feed additives, these substances contribute to a rapid increase in weight, better utilization of the feed, and an improvement in the general state of health of the animals. Feed additives containing these compounds have, therefore, special importance for the feeding of farm and domestic animals, in particular for that of growing animals, e.g. of young pigs, cattle, in particular farrows, calves or lambs, but also horses, dogs, rodents, fur-bearing animals, fowls, chicken, pets or caged birds.

As anion of an inorganic or organic acid which is nontoxic to the animal organism there are suitable for example those of hydrochloric acid, hydrobro-mic acid, hydroiodic acid, sulfuric acid, alkyl-sulfuric acids, perchloric acid, phosphoric acid, naphthoic acids, embonic acid and pamoic acid.

Some of the active substances of general Formula 1 are known and all can be obtained by known processes,

wherein R represents an alkyl, alkenyl or alkynyl radical each of which radicals has not more than 4 carbon atoms, R represents an alkyl radical having from 1 to 4 carbon atoms, the benzyl or phenethyl radical or a benzyl or phenethyl radical mono-or polysubstituted by halogen atoms, by alkoxy or alkylthio groups having from 1 to 4 carbon atoms or by methyl, hydroxyl, nitro or cyano groups, or

R and R together with the nitrogen atom to which they are linked represent the pyrrolidine, piperidine, morpholine or thiamorpholine radical or a methylated pyrrolidine, piperidine, morpholine or thiamorpholine radical R represents an alkyl radical having from 1 to 4 carbon atoms and in the case that R is an alkyl radical, R may also represent the benzyl or phenethyl radical or a benzyl or phenethyl radical monoor polysubstituted by halogen atoms, by alkoxy or alkylthio groups having from 1 to 4 carbon atoms or by methyl, hydroxy nitro or cyano groups,

R represents hydrogen or an alkyl radical having from 1 to 3 carbon atoms R represents an alkyl radical having from 1 to 3 carbon atoms, and

X represents an anion of an inorganic or organic acid affording salts of Formula II which are readily tolerated by the organism of animals being treated therewith.

The new compounds of the general Formula I are produced according to the invention by reacting a ,B- amino-propiophenone of the general Formula 111 wherein R R and R have the meanings given above, with a quaternishing agent of the general Formula IV R X (IV) wherein R has the meanings given above and X represents a halogen atom, an alkyl sulfate or alkyl sulfonate group,

hal represents chlorine or bromine and R has the meanings given above with a tertiary amine of the general Formula VI wherein wherein R R and R have the meanings given above and, if desired, further treating the so obtained salts as described above.

Alkyl halides, particularly methyl iodide, dialkyl sulfates and toluene sulfonic acid esters can be used as quaternising agents. The tertiary amines of Formula III which are quaternised to form the active ingredients of Formula I can be produced either by condensing an acetophenone derivative With formaldehyde and the salt of a secondary amine, or by reacting a benzoyl chloride derivative with tetrachloroethane in the presence of aluminium chloride and then reacting with a secondary amine. If the anion of the quaternary ammonium salts is toxic to the animal organism, then this can be exchanged for one of a suitable acid mentioned hereinbefore.

The compositions according to the invention can contain, for example, the active substances of Formulas I and II the preparation of which is described in the following non-limitative examples. Parts and percentages are given therein by weight unless expressly stated otherwise. Temperatures are in degrees Centigrade.

EXAMPLE 1 224 parts of j3-dimethylamino-4- (N'-methyl-N-tosylamino)-propiophenone hydrochloride are added to a solution of parts by volume of glacial acetic acid and 450 parts by volume of 70%-(v./v.) sulfuric acid and the whole is refluxed for 10 minutes. The reaction mixture is poured onto ice, made alkaline with sodium carbonate until its pH is 8, extracted with chloroform and then the chloroform solution obtained is evaporated to dryness.

117 parts of the B-dimethylamino-4-methylamino-propiophenone thus obtained are dissolved in 1200 parts by volume of acetone, parts of methyl iodide are added and the whole is stirred for 15 minutes. The precipitate formed is filtered olf, washed with acetone and then dried. The N-[/3-(4-methylaminobenzoyl)-ethyl]- trimethyl ammonium iodide obtained melts at 188190.

EXAMPLE 2 7.0 parts of dimethyl sulfate dissolved in 50 parts by volume of acetonitrile are added to a 0 cold solution of 10 parts of 3,4'-bis-dimethylaminopropiophenone (produced from 150 parts of 4-dimethylaminoacetophenone, 40.5 parts of paraformaldehyde and 83 parts of dimethylamine hydrochloride) and 100 parts by volume of acetonitrile. The mixture is stirred for 2 hours and the precipitate formed is filtered ofi. The N-[fl-(4-dimethylaminobenzoyl)-ethyl]-trimethyl ammonium methosulphate obtained melts at 154157.

EXAMPLE 3 9 parts of allyl bromide dissolved in 20 parts by volume of acetone are added to a solution of 15 parts of 3,4'-bis-dimethylaminopropiophenone in 100 parts by volume of acetone at 0. The reaction mixture is stirred for 30 minutes and the precipitate formed is filtered 01f. N-[{3-(4-dimethylaminobenzoyl)-ethyl] N dimethyl-N- allyl ammonium bromide is obtained, M.P. 167-169.

EXAMPLE 4 17 parts of N-[,6-(4-dimethylaminobenzoyl)-ethyl]- trimethyl ammonium methosulfate are dissolved in 35 parts by volume of water. This solution is filtered and added to a solution of 11 parts of disodium pamoate in 125 parts by volume of water. The reaction mixture is stirred for 1 hour at 10. The aqueous phase is decanted and the oily phase is taken up in salt solution. The oil crystallises whereupon the crystalline mass is washed three times with water, filtered off and dried at 30/ 12 Torr. The N [,8 (4 dimethylaminobenzoyl)-ethyl]-trimethyl ammonium pamoate obtained melts at with decomposition.

EXAMPLE 5 25 parts of N-[,8-(4-dimethylaminobenzoyl)-ethyl]- trimethyl ammonium methosulfate are dissolved in 50 parts by volume of water. The filtrate is added to a 0 cold solution of 9 parts of sodium fiuoroborate (NaBF in 50 parts by volume of water and the whole is stirred. After minutes, the precipitate formed is filtered ofl, taken up in a little water, again filtered off and dried. The N [B (4 dimethylaminobenzoyl)-ethyl]-trimethyl ammonium fluoroborate obtained melts at 214-218".

EXAMPLE 6 A mixture consisting of 10 parts of 3,4'-bis-dimethy1- amino-propiophenone, 100 parts by volume of anhydrous acetone and 11 parts of benzyl iodide is stirred for 15 minutes at room temperature and then filtered. The N- [,3- (4-dimethylaminobenzoyl) ethyl]-N,N-dimethyl-N- benzyl ammonium iodide formed melts at 153156.

EXAMPLE 7 24 parts of 4'-(N-methyl-N-acetylamino)-3-chloropropiophenone are dissolved in 400 parts by volume of acetone. 10 parts of a 40% by volume aqueous trimethylamine solution are added to this solution and then the whole is left to stand for 30 minutes. The precipitate formed is filtered off and dried. The N-[B(4N-methyl- N-acetylaminobenzoyl)-ethyl]-trimethy1 ammonium chloride formed (M.P. 168-171) is refluxed with 2 parts of 7 N hydrochloric acid for 30 minutes whereupon the solution is evaporated in vacuo. The residue is taken up in ethyl alcohol, filtered and washed with acetone. The N- 3- (4-methy1aminobenzoyl -ethyl] -trimethyl ammonium chloride melts at 162l64.

In an analogous manner and from correspondingly substituted starting materials of Formulas III and IV, compounds of Formulas I and II can be prepared, in which the substituents R R R and R are those iven in the respective columns of Table I below.

TABLE I NO. R R3 R3 R4 X CH CH NHCH Cl CH3 CH NHCH I CH3 CH NHCH CH3SO4 CH3 NHCH3 I CH3- CH3 CH NHG2H5 I CH CH NHC H I CH3 3 3)2 C1 CH3 3 N( 3)2 I CH CH N(CH CH SO| CH CH N(OH )3 3-hydroxy-2-naphthoate a 0H3 N(CH )3 Pamoate CH CH3 N(CH3)3 BF4 02H Cz s I n-C H N-C3 CH3 N(CH3)3 I n-C4H9 n-C4H9 CH N(CH )2 I SEC-0411b CH3 CH3 N(CH3%3 OHQSOI -CH3CH=CH1 CH3 CH3 N(CH3 1 B1 CH:C=CH CH CH N(CH3)1 B1 -CHg-CH=CH-CH3 CH3 CH (CH )3 Bl CH CH3 N(CH )1 I -CHg 21 CH3 CH N(CH I CHr- C1 22 CH3 CH N(CH )3 I -CHg B1 23 CH CH N CH )2 I 24 -CH: CH3 N(CH3)2 I CH2 N03 25 CH3 CH3 N(CH )3 I CH2 CH3 26 CH3 CH3 N(CH3)2 I -CH2- CN 27 CH3 CH3 N(CH )3 I -CH2 OCH3 28 CH3 CH3 N(CH3)3 I 29 CH3 CH3 N(CH3)3 I CH2 SCH3 30 CH3 CH3 N(CH3)2 I CH3- SCAH;

31 CH3 CH3 N(CH )3 I CH2 Cl 32 CH3 CH3 N(CH3)3 I TABLE I-Coutinuevi N0. R1 R2 R3 R4 33 CH3 CH3 N(CH3)3 I C2H4 -Cl 34 CH3 CH N(OH3)2 I CzH4 B1 35 CH3 CH3 N(CH3)3 I CzH4 -OH 36 CH3 CH N(CH )1 I -CzH CH 37 CH3 CH3 N(CH3)3 I -CzH4- OCH;

38 CH3 CH3 N(CH3)3 I 'C2HA OC4H9 39 CH3 CH3 N(CH3)3 I CzH4- SCH3 40 CH3 CH3 N(CH3)2 I -CzH4- SCqHg 41 CH3 CH3 N(CH3)3 I CzH4 C1 42 CH3 CH3 N(CH3): I

-C3H4-- O1 43 CH3 CH3 CH3 N(CzH5)2 I CH3 N (CH3)2 I a C 3 N(OHa)a I 46 N: CH3 N(CH3)2 I 47 CH N CH I 48 CH3 N(CH3)3 I 49 N/ \0 CH3 N(CH3):; I

50 CH3 CH3 N(CH3)3 I 51 CH3 CH3 CH3 N(C H7)g I The feed additives according to the invention can confrom correspondingly substituted starting materials and tain besides the compounds of general Formula II listed the substituents R R R R and anion X of which are above also e.g. the compounds falling under the general given in the respective columns of Table II below.

Formula I, which are produced in an analogous manner TABLE II N0. R1 R2 R3 R4 X 1 CH3 -CH3 -CH3 H I 2 CH OH CH E 011330 -0H3 win-Q -0H3 H 1 4 CzHs C2H5 CzH5 H I 5 'CII3 -CH3 --CH3 Cl I 6 .-CH -CH CH3 OH I Anthelmintic compositions, including feed additives according to the invention, which contain as active ingredients the compounds of the general Formula I, can be administered directly to animals in the form of solutions, emulsions, suspensions, drenches, powders, tablets or boluses or in the form of gelatin capsules, or they can be admixed to their feed.

The active substances of Formulas I and II, which have a marked anthelmintic action against the most varied types of helminths such as Ascaridae, Trichuridae, Strongyloidae, Anoplocephalidae, T aeniidae, Hymenolepididae, in pets and domestic animals such as cattle, pigs, horses, sheep, goats, dogs, cats and fowls, can be administered to helminth-infested animals or to animals to be protected against helminths in the form of therapeutical preparations either as one single dose or repeatedly, the single dosage, depending on the type of animal, preferably between and 1000 mg. per kg. body weight. In some cases better results are obtained or the total amount required for a cure can be decreased by protracted administration. The concentration in which the active substances in the form of such agents are added, e.g. to feeds or liquids given to animals are between 0.01 and 1% by weight.

To prepare the forms of application given above, conventional solid carriers can be used, for example kaolin, talcum, bentonite, sodium chloride, calcium phosphate, hydrocarbons, cellulose powder, Carbowaxes, gelatins, or liquids such as water, if desired with the addition of surface active agents, ionic or non-ionic dispersing agents or emulsifying agents, oils and other solvents which do not injure the animal organism. These agents can also be added in solid form to the animals feed. Suitable carrier materials in feed concentrates (feed additives) are, among others and in addition to those mentioned above, energyproducing feed, grain feed, protein concentrates, fish meal,

soya-bean meal, cotton seed meal and linseed meal. Such a concentrate, usually having a concentration of about 25% by weight, is then thoroughly mixed with other conventional feed additives or fillers, such as mineral agents, vitamins, antibiotics, chemotherapeutics, bacteriostatics, fungistatics, coccidiostatics, hormone preparations, substances having an anabolic action or other substances which promote growth, influence the quality of the meat of animals to be slaughtered or are useful to the animal organism in any other way. In this manner, a premixture (feed additive) is obtained which contains, e.g. 510% by weight of the active substance of the general Formula I. A suitable amount of this premixture is then equally distributed by means of a mixer in a usual commercial food such as a grain mixture or other vegetable or animal substances. The finished feed contains the substances of Formula I preferably in a concentration of about 0.01-1% by weight.

Tests performed on hens and mice suffering from hehninthiasis are described below.

Tests on hens infested with Ascaridia galli p of test animals within 5 days after the first administration of the first dose of active substance was determined daily as well as the number of worms still found in the intestine at necropsy on the 5th day of the test. In addition, the number of hens no longer infested with worms was also determined.

{lscaridia gaZli eliminated from 5 hens in 4 days Total daily Percent No. of dose of the hens (mg/kg. number free body Absolute of worms from Substance weight) No. in 5 hens worms N-( 9-benzoylethyD-trimethyl ammonium iodide 1, 000 78 100 5 N-(/S-benzoylethyD-trrmethyl ammonium methosulphate- 500 117 100 5 N-[B-(4-methylbenzoyD-ethyH-tnmethyl ammonium iodide 1, 000 228 100 5 N-[;8]-)(4-hydroxybenzoyl) -ethyl]-tr1methyl ammonium iodide- 500 305 96 4/5 z 500 185 100 N-[B-(4-aminobenzoyl)-ethyl]-dunethylbenzyl ammonium iodide- 500 103 93 3/5 N-[B-(4-methoxybenzoyl)ethyll-trmethyl ammonium iodide 500 70 98 4/5 N-[fi-(4-methoxybengoyl)-ethyl -N-methyl piperidinium methosulphate 500 168 100 5 N-[B-(4-d methylam nob enzoyl) -ethyl]-tr1methylammonium iodide 500 218 100 4/5 N-[B-(4-d methylammobenzoyl)-ethyl]-N-methyl-diethylammonium iodide 500 104 99 4/5 N-[B-(4-d methylam nobenzoyl)-ethyl]-N-benzyl-dimethylammonium iodid 500 159 100 5 N-[s-( i-d methylam nobenzoyl)-ethyl]-1,4-d1methylpiperidinium iodide 500 54 100 5 N-[B- (4-d methylam nob enzoyl) ethyl] -1,3-d1methylpip eridinium iodide. 500 107 100 5 N-[B-(4-d11nethylarnmobenzoyl)-ethyl]-l I-1nethyl piperidinium iodide 500 123 76 2/5 N -(4methylammobenzoyl)-ethy1]-tr1methy1ammonium iodide 500 169 100 5 Controls 143 Tests on mice infested with Hymenolepis norm The active ingredients, in the forms of a suspension, were administered by artificial feeding to white mice which had been artificially infested with Hymenolepis nana. Five animals were used for each test. The active ingredients were administered to each group of animals on 3 or 4 consecutive days and then the animals were dissected on the 8th day after the beginning of the treatment.

The results were evaluated by counting the number of tape worms in the intestines of the dead animals. Untreated mice which had been infested at the same time served as controls.

EXAMPLE III A 10% feed concentrate (basic feed) is produced from the following components:

Infestation Length animals of with Daily treat- Hymadose, ment, nolepis Substance mg./kg. days mma N-[B-(4-aminobenzoyD-ethyH-trimethyl ammonium iodide 300 4 0-0-0-0-2 N-[B-(4-aminobenzoy1)-ethyl]-trimethy1 ammonium methosulphate 400 3 0-0-0-0-0 N-[fl- (4-aminob enzoyl) -ethyl]-diethylmethyl ammonium iodide- 750 4 00-00-0 N-[fl-(4-dimethylaminobenzoyl)-ethyl]-trimethyl ammonium iodide i fi N-[fl-( i-benzamidobenzoyl)-ethyl]-tr1methyl ammonium iodide 750 3 mg Controls- The following non-limitative examples illustrate the preparation of feed concentrates and feed additives according to the invention. Parts and percentages are given therein by weight unless expressly stated otherwise.

EXAMPLE I A wettable powder is produced by thoroughly milling and mixing parts of N- [B-(4-aminobenzoyl)-ethyl]-N, N-dimethyl-N-benzyl ammonium iodide, 30 parts of a synethetic calcium silicate (Microcell), 19.5 parts of kaolin and 0.5 part of a solid condensation product obtained from ethylene oxide and propylene oxide having a molecular Weight of about 8000, having a central block of propylene polymer of an average molecular weight of about 1500 flanked on each side by ethylene oxide polymer (for example the commercially available Pluronics F 68). When this mixture is stirred with water, a pulpy concentrate is obtained which is particularly suitable for administration to pets and domestic animals.

Similar results are obtained when replacing the ammoniurn salt in the above composition by the equal amount of one of the compounds listed in Tables 1 and 2.

EXAMPLE II 1 part of N-[B-(4-aminobenzoyl) -ethyl[-trimethyl ammonium iodide is carefully mixed with 19 parts of sodium chloride and this mixture is administered to the animals in such amounts that a daily dosage of 101000 EXAMPLE IV A 50% powder of the following composition:

Parts N-[B-(4 methylthiobenzoyl)-ethyl[-N-trimethyl ammonium iodide Tylose/kaolin mixture 1: 1 2 Sodium benzoate 0.8 Sodium lauryl Sulphate Q05 Sorbitol monostearate 5 White flour 92.15

is produced by thoroughly mixing the individual components. This powder is diluted with liquid or pulpy foodstuffs and given in this form to pets and domestic animals.

A few days after treatment, no more worms or eggs are excreted by the animals and they are free of worms to all intents and purposes.

EXAMPLE V 50 parts of N-[fi-benzoylethyntrimethyl ammonium iodide are thoroughly mixed with 0.8 parts of sodium benzoate, 2 parts of tylose, 5 parts of sorbitan monooleate and 42.2 parts of white flour to form a 50% concentrate which can be dispersed in any concentration desired e.g. in water or milk.

50 four week old chickens having an average weight at the beginning of the test of 455 g. were fed for 37 days with a chicken fattening food. The food was mixed with the above feed concentrate in such amounts that the content of active substances in the food given was 0.01%.

50 chickens of the same breed and age having an average weight at the beginning of the test of 455 g. were fed with the same chicken fattening food without the addition of the concentrate. After 37 days, the average weight of the untreated chickens was 1107 g. whilst that of the treated chickens was 1190, which corresponds to an about 7% higher weight. The total amount of food eaten by both groups was the same.

EXAMPLE VI 10 parts of N-[,3-(4-methoxybenzoyl)-ethyl-N-methylpiperidinium methosulphate are thoroughly mixed with 90 parts of a concentrated feed meal which is well balanced with regard to its nutritional content. The concentrated feed meal consists of:

Roughage4.5

Crude protein-l 8.5% Digestible protein-15.7% Total nutrients-66.5 Vitamin A9000 I.U/ kg. Vitamin D --1200 I.U/ kg. Vitamin B 6 mg./ kg.

The feed additive can be fed to pigs and sheep as such in a measured quantity or can be included in a 0.01l%

. admixture (weight content of active substance) in the normal feed. Higher doses are administered over a shorter time, lower doses are given over a more extended time. The general condition of the animals is improved and simultaneously a better rate of weight gain is attained.

EXAMPLE VII The active substance, N-[fi-benzoylethyD-trimethyl ammonium methosulphate, is intimately blended with a feed containing:

Roughage-4-5 Crude protein-18-20% Total nutrients-6770 Vitamin A-12,000 I.U/kg. Vitamin D 1,5 I.U/ kg. Vitamin B 8 mg./kg.

to form a 0.050.5 active substance-containing feed mixture. This mixture is specially suited for feeding fowls. Fowls fed with said mixture show within 4 weeks an about 7% better rate of weight gain than those fed with normal feed.

EXAMPLE VIII -N [fi-(4-methylbenzoyl) -ethyl]-trimethyl ammonium iodide is triturated with dextrin or sugar to form a 20% concentrate. 1 g. of this mixture is dissolved in 1 liter of full cream milk and the solution is given to 10-20 day old calves once daily for four weeks. The calves fed in this way with 200 mg. of active substance per liter of milk showed an about better increase in weight after 4-5 months than those which received no additive in the milk.

EXAMPIJE 1X N-[p-(4-aminobenzoyD-ethyl]-dimethylbenzyl ammo- 14 nium iodide is triturated with a previously sieved feed of the composition:

Roughage46% Crude protein18-20% 5 Total nutrients6770% Vitamin A4000 I.U/kg. Vitamin D 600 -I.U/k-g.

to form a 5% active substance-containing concentrate. Portions of this mixture were mixed with a commercial pig meal and fed to young pigs so that each animal at each feed received 100mg. of active substance per kilogram of pig meal.

20 young piglets having an average weight of 20 kg. at

the beginning of the test were fed for 2 weeks with a feed which was mixed with this concentrate (feed additive) in such amounts that the content of active ingredient was 0.005%.

young piglets having the same average weight (20 20 kg.) received the same amounts of the same feed but without the addition of active ingredient to the feed.

After a period of 10 weeks, the test piglets were again fed for 2 weeks with the feed concentrate containing active substance in the same amounts as given above. In the interval 10 weeks) and for 6 weeks after the second treatment period they received quantitatively and qualitatively the same feed without the feed additive as the control animals.

Before slaughtering, i.e. after, in all, 20 weeks from the 0 beginning of the test, the average weight of test animals was 108 kg. whilst that of piglets which received the feed without the additive was only 92 kg. Thus, the improve ment in the weight increase of the animals nourished with the feed containing active ingredient was 14.8%.

Example X A poultry feed of the following composition is prepared:

Basic feed: G. Semolina 220 Coarsely ground maize 220 Coarsely ground barley 80 Groats 60 Suet Codfish meal 100 Fish meal 30 Skimmed milk powder 20 Soya cake 100 50 Sunflower cake 70 Peanut cake 30 Bone meal 5 Calcium carbonate 10 Sodium chloride 3 Milled sand 2 The following additives are added to this basic feed per kilogramme:

Mg. Lysine 500 Bacitracin zinc salt 20 Nitrofurazone 125 Trace elements:

Vitamin B 15 Vitamin B 4 Vitamin B 2 Vitamin B12 Nicotinic acid 10 Choline 25 Pantothenic acid 10 Folic acid 0.5

Vitamin A 12,000 Vitamin D 1,000 Vitamin E 10 R and R together with nitrogen atom to which they are linked represent pyrrolidino, piperidino, morpholino or thiamorpholino, methylated pyrrolidino, methylated pyrrolidino, methylated morpholino, or methylated thiamorpholino,

R represents alkyl of from 1 to 4 carbon atoms,

R represents hydrogen or alkyl of from 1 to 3 carbon atoms,

R represents alkyl of from 1 to 3 carbon atoms, and

X represents an anion of a therapeutically acceptable acid.

2. A compound as defined in claim 1 in which R and R together with the nitrogen atom to which they are linked represents piperidino.

References Cited UNITED STATES PATENTS 3,000,946 9/1961 De Stevens.

NORMA S. MILESTONE, Primary Examiner S. D. WINTERS, Assistant Examiner US. Cl. X.R.

US 21.20/22 151v P: October 8, 1970 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,528, 985 Dated September 15, 1970 InVEHtOI-(S) Alfred Margot and Jean-Jacques Galley It is certified that 'error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 16, line 3: "pyrrolidino" should read --piperidino--.

SIGNED Mb EALE IIN 24m] Bom 1 wmuu 1. 50mm. 8- Offiw Gollilflim of Pat FORM PO-IOSO (10-69) usoMM-DC wave-Pee i U S. GOVEIHMENY PIINYING OFFICi' Ill! O-Jl-l 

